Rechargeable battery pack



FIG. 1 is a perspective view of a rechargeable battery pack showing our new design;

FIG. 2 is a top view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left view thereof;

FIG. 6 is a right view thereof;

FIG. 7 is a bottom view thereof; and,

FIG. 8 is a perspective view of a rechargeable battery pack as a counterweight with a telescope mount thereof. The broken lines showing the telescope mount in the drawings are included for the purpose of illustrating environmental structure and form no part of the claimed design. 

CLAIM The ornamental design for a rechargeable battery pack, as shown and described. 